Typewriting machine



July 31, 1923- 1,463,535

E A. PETERSON TYPEIWRITING MACHINE Filed May 20, 1922 Patented July 31, 1923.

UN 1 Tj'E D S TLA T E15 PA T E NT? CE;

EDWIN'A. PETERSON, 0F MADISON, 'WISCONSIN, ASSTGNOR {TO UNDEBWOOD 'TYYE- WRI'IEB. COMTANY, OF NEW YORK, N. Y.,' A CORPORATION OF DEIJAWA BE."

TYPEWRI 'I'ING MACHINE.

Application filed'llay B0, 1922. Serial No. 562,274.

To all whomit may concern:

Be itknown that I, EDWIN A. Pn'rnnson, a citizen of the United States, ,residingin Madison, in the county of Dane and State of Wisconsin, have invented certain new and useful Improvements in Typewriting Machines, of which the following isia specification.

This invention relates to releasable tor disengageable paper-engaging or paperguiding devices of a typewriting machine,

and relates more particularly to the curved paper-guiding fingers which usually extend downwardly at the "front of the platen, for

guiding a worksheet upwardly around the the paper-guiding fingers, each finger has an arm whichvis pivoted to swing upon'and also mounted to slide along a rod which extends parallel to the platen and is fixed at its ends in ,the end walls oi the platenframe, usually rearwardlyi from the top of the platen. For releasably, or. disengageably holding the paper-guiding finger at its effective position and for yieldingly pressing it towards the platen, the supportmg arm of the a small roll an a spring for pressing the roll into a groove which extends along the rod throughout its length. When lllllS desired to withdraw the paper-guiding-fin er from the .platen,it may be swung upwardly andrearwarclly around the rod, the springpressed roll being then forced, by cam ae tion, out ofthe groove and upon the cylindrical outer surface of the rod, upon which the roll may move around the rod, whereupon the friction of the spring-pressed roll upon the rod will hold the paper guiding finger at whatever elevated position to which it may be swung. When it is desired to adjust the paper-guiding finger along the platen, such adjustment is usually made with the finger ,at its raised position, so that the work-sheets on the platen will not be disturbed, and also because it is often-desired to adjust thepaper-guiding finger-past .a itypesguide and other devices Eaperguiding finger carrieswhich are commonly mounted inotront .ofl and near to theiplatenot ebonttheapsinting, line, below which the. papen-guidangfin-w gers usually extend. When the papeugniding finger is swung upwardly, obviously the spring pressed rolliwill be pressed ,by its spring more strongly against the-fingersu-pportingrod than when ,the rolliis in the groove, so that, when nthe paper-guiding, fingenisat its elevated ositiomithe small roll is pressed so strongly, against jthegcylindrical surface of the fingersupporting rod that there is considerabl frictional resistance against sliding the finger-carryin arn along the rod, the springepressedr having a strong tendency to bind ,uponthe rod, so as to preventthelinger-carr ing arn from sliding freely ,thereon,i there y mter' faring with the adjustment of the lifted, paper-guiding finger along the laten.

In order to overcomei this o jection, Eaocording to the present invention, the fi ersupporting rod is formed with ,a reliefgroove extending throughoutthe lengthiof the rod at the proper place, so.-,that, when the paper-guiding finger is ,raised-from-the platen to the desired position,.the small spring-pressed roll will ,enter therelief groove and thereby relieve the tension of its spring, so that the V finger-carrying arm ,Inay slide freely along the rod, thereby enabling. the elevated paper-guiding finger to. be ,adjuited along the platen without any difficu t .7

O t her features and advantages will here-- inafter appear.

In the accompanying drawings,

Figure 1 illustrates an embodiment of the present invention in a typewritingimachine, and is a largely diagrammatic-front? to-rear vertical section, with ,parts in ole,- VittlOIlySllOWlDg a platen-frame,-with .associated parts, including a {paper-guiding. finger at its effective position.

Figure 2 is a similar view, but with the paper-guiding finger raised away from the, platen, so as to be freely adjusted along the platen, by reason of the presentginveir tion.

Figure 3 is a front eels-nation, substan-E tially as viewed from the right of Figure l, and shows two paper-guidingfingers at their paper-guiding positions at .the front of the platen.

In order clearly to undenstandithepresent invention, the usual associated parts of the typewriting machine, which are involved in the present invention and (to-operate therewith, will be first described; the typewriting machine, parts of which are shown in the drawings, being a usual or standard Underwood machine. In this machine, a revoluble platen l is journaled by means of its axle 2. in the end walls 3 of a usual platen-frame including a lower tie-rod 1, the piaten-frame carrying the usual releasable front and rear feed-rolls 5 and 6 to run upon the bottom of the platen. The printing point at the front of the platen is indicated in Figure 1 by the lower-case type carried by the raised type-head 6.

Usual right and left curved paper-guid ing fingers T extend from above down wardly at the front of the platen beyond the printing line, each finger 7 being provided at its upper part with a usual sum 1 pressure-roll 8, and each finger '7 being carried by an arm 9, which is connected thereto, at the forward end of the arm and at the upper end of the finger, by means of a trans-- verse intermediate portion 10 provided with an upstanding forwardly-curved fingerpiece 11. At their rear ends, the forwardlyextending finger carrying arms 9 are mounted to swing or rock upon, and also to slide along, a finger-supporting rod 12, which e. tends parallel to the platen 1 at the rear of the top of the platen, and at its ends is firmly fixed in the end walls 3 of the platenframc. Each arm 9 of the corresponding paper-guiding finger 7 is pivotally and slidably mounted upon the transverse rod 12 by means of an inwardly-turned U-shaped portion comprising an outer side-part 13, forming a continuation of the arm 9, and an inner side-part 1a spaced inwardly from the outer side-part 13 and connected thereto by means of a transverse connecting part or member 15. The construction of the two paper-guiding devices, including the fingers T, is the same except that one is right-hand and the other is left-hand, as will be clear from the drawings.

Means are provided for releasahiy or disengageably holding the paper-guiding fingers 7 in proximity to the front of the platen 1, to press against and guide the side margins of a work-sheet on the platen; comprising, for each paper-guiding finger 7, a small rod-like roll 16 having reduced ends 17, which are guided in small slots 18 provided in the respective sides 13 and 14 of the U-shaped part of the finger-carrying arm 9. the roll 16 being yicldingly pressed towards the finger-supporting rod 12 by means of a curved leaf'spring 19 having outwardly-turned straight ends 20 to press against the ends of the roll 16, and having small down-turned cars or lugs 21 engaging at opposite sides of the transverse connecting member 15, to hold the spring in place. The ends 20 of the spring 19 are curved to fit the roll it}, as shown in Figure 2. The spring 19 presses the small roll 16 into a nearly semi-circular holdinggroove 22 in the rod 12, and extending along this rod throughout its length between the end walls 3 of the platen frame; in the construction shown in the drawings, this roll-receiving groove 22 being shown in the lower side of the rod 12. In the effective or paper-guiding position of the fingers 7 shown in Figures 1 and 3 of the drawings, the spring-pressed roll 16 is engaged in the groove 22, so as yieldingly to press the fingers 7 towards the platen. hen the small roll 16 is in the groove 22, it forms a spline. When a paperguiding finger T is raised, or swung upwardly from the platen I, the small finger-holding roll or spline 16. which also forms a detent. will be eammed out of the holding groove 22, and wili ride upon the cylindrically-curved outer surface 23 of the rod 12; and the pressure of the roll 16 against this outer surface 23 of the rod 12 will be greater than the pressure of this roll against the bottom of the holding-groove 22, by reason of the increased tension of the spring 19. The construction so far described is the same as has heretofore been commonly employed in the Underwood typewriting machine.

According to the present invention a relief-groove 24 is cut or otherwise formed along the rod 12, and extends throughout the length of this rod between the platenframe end Walls 3. This relief-groove 24 is provided at the proper place, in circumferentially-spaced relation to the holdinggroove 22, so that the relief-groove 21 will receive the small detent-roll or spline 16 when the paper-guiding finger T is swung to the desired raised position, as shown in Figure 2. In the construction shown in the drawings, the relief-groove 21 is provided in the upper portion of the front of the rod 12. The relief-groove 24 relieves the tension of the spring 19. so that the small roll 16 will be pressed with much less force against the bottom of the. relief-groove 2 1 than it was pressed against the cylindrically-curved outer surface 23 of the rod. 12. This decreased pressnre of the detent-roll 16 against the rod 12 greatly lessens the Friction of sliding the spline-forming detent-roll 16 along the rod 12 when this roll is in the re lief-groove 24. and avoids or eliminates the tendency of the roll 16 to bind upon the rod 12. whereby the arm 9 of the finger 7 may be easily slid or slipped along the rod 12, thereby enabling the paper-guiding finger 7 to be freely adjusted along the platen 1, when the paper-guiding finger 7 is swung to its elevated position shown in Figure 2. This relief of pressure of the spring-pressed detentloo Eli

roll 16 against the finger-supporting rod 12 similarly applies to both of the paper-guiding fingers 7, so that either of these fingers, in its elevated position, may be freely adjusted along the platen 1. without binding or undue friction upon the rod 12. In adjusting the paper-guiding finger 7 along the platen 1, the small detent-roll 16 acts as a spline in the relief-groove 24 to guide the fingers 7 at the raised position thereof shown in Figure 2.

The somewhat less than semi-circular holding-groove 22 snugly receives the small detent-roll 16 and is of the proper depth, so that the pressure of the roll 16 in this groove will be effective to hold the paperguiding finger 7 and its pressure-roll 8 in proximity to the platen 1, as shown in Fig ures. 1 and 3. 7 However, in order to afford maximum relief to the spring 19, so as correspondingly to decrease to a maximum extent the pressure of the roll 16 in the reliefgroove 24, this relief-groove may be of somewhat greater depth than the holding-groove 22, as well as somewhat wider, and may be provided with sloping sides to enable the small detent-roll 16 to become disengaged from or ride out of the relief-groove 24 when it is desired to return the paper-guiding finger 7 from its elevated position shown in Figure 2, to its effective position shown in Figures 1 and 3. The above-noted differences between the holding-groove 22 and the relief-groove 24 will be evident by an inspection of Figures 1 and 2.

Variations may be resorted to within the scope of the invention, and portions of the improvements may he used without others.

Having thus described my invention. I claim:

1. In a typewriting machine. in combination, a rod fixed upon and extending transversely of the machine, a paper-engaging device mounted to be swung upon the rod to or from effective position. and also 'slidable along the rod for adjusting said device to different positions transversely of the machine, said rod being cut away longitudinally thereof to provide a holding-portion. and a spring-pressed detent carried by said device to be pressed against said holdingportion of the rod for yieldingly holding said device at its effective position, said rod also being cut away longitudinally thereof to provide a relief-portion to receive said spring-pressed detent for relieving the pressure of said detent against the rod when said device is swung to ineffective position, so that said device may slide freely along the rod to different positions of adjustment transversely of the machine.

2. In a ty ewriting machine, in combination, a rod tilted upon and extending transversely of the machine, a paper-engaging device mounted to be swung upon the rod to or from effective position and also slidable along the rod for adjusting said device to different positions transversely of the ma chine, said rod being provided with a holding-groove extending longitudinally thereof and also being provided with a relief-groove extending longitudinally thereof. and a spring-pressed detent carried by said device and releasably engageable in said holding groove for yieldingly holding said device at its effective position, and in the ineffective position of said device said detent being releasably engageable in said relief-groove to relieve the pressure of said springpressed detent against the rod, so that said device may slide freely along the rod to different positions of adjustment transversely of the machine.

3. In a typewriting machine, the combination with a platen-frame and a revoluhle platen journaled therein, of a rod parallel to the platen and fixed at its ends to the platen-frame. a paper-guiding device to cooperate with the platen and pivoted on said rod to enable the paper-guiding device to he swung away from the platen and slidahic on said rod to adjust the paper-guiding device along the platen, said rod being cut away longitudinally thereof and a detentmember carried by said device to be spring pressed against said rod where it is cut away for holding the paper-guiding device in co-operutive relation with the platen, said rod also being cut away longitudinally thereof at another place on its circumferonce to relieve the pressure of said springpressed (latent-member against the rod when the paper-guiding device is swung away from the platen. so that the paperguiding device may he freely adjusted along the platen.

4. In a typcu 'riting machine. the combination with a platen-frame and a revoluble platen journuled therein, of a rod parallel to the platen and fixed at its ends to the platen-fral'nc, a. paper-guiding device to co operate. with the platen and pivoted on the rod to enable the iaper-guiding device to he swung away from the platen and slidable on the rod for adjusting the paperguiding device along the platen, said rod having a groove extending lengthwise thereof. and a roll carried by said device and spring-prcsscd into said groove for holding the papcrguiding device in proximity to the platen, said rod having another groove along its length at another point circumferentially thereof to receive said springpressed roll for relieving the pressure of said roll against the rod when the paper-guiding device is swung away from the platen, so that the paper-guiding device may be freely djusted along the platen.

5. in a typewriting machine, the combination with a platen-frame and a revoluble platen journaled therein, of a rod parallel to the platen and fixed at its ends to the platen-frame. a paper-guiding device to (:0- operate with the platen and pivoted on the rod to enahle the paper-guiding device to be swung: away from the platen and slidable on the illll for adjusting the paper-guiding device along the platen, said rod having a holding-groove extending lengthwise thereof. and a roll carried by said device and sprin u' pressed into said groove for holding the paper-guiding device in proximity to the platen. said ind also having a relief- ;rroove along its lvng'tl to receive said 1)Illl f-])l"(SriL*ll roll for relieving the pressure ol' said roll against the rod when the paper-guiding device is swung away from the platen. so that the papenguiding device may he l'ri-rly adjusted along the platen, said relief-groove being of greater depth than said holding-groove, whereby When said spring-pressed roll is in said holdingioove it will live ell ertive to hold said de vim in proximity to the platen, and when said spring-pressed roll is in said relief- ;ruove inaximmn reliel of pressure of said roll against said rod will he attorded.

(3. 111 a typewriting machine, the combination with a platen-flame and a revoluble platen journaled therein of a rod parallel to the platen above and to the rear thereof and fixed at its ends to the platen-frame, a L'llI'YLll paper-guiding finger extending down in frontv of the platen to co-operate therewith and having an arm pivoted on the roll to enable the mpel-guiding finger to he swung upwardly away from the platen, said arm being slidable along the md to adjust the paper-guiding finger along the platen, said rod having a holdinggroove extending lengthwise thereof, and a T-iEHlIlLI-XHUSHltl roll rarried by said arm to engage in said groove for holding the. paper-guiding finger down in proximity to the platen. said rod having: a relief-groove i-xtl-a'nlingg lengthwise thereof in eireunit'erentially-spaeed relation to said holdinggroove {or receiving said. spring-pressed roll when the paper-guiding finger is swung uynvardly away from the platen, to relieve the pressure on said rod. of said springpressed roll, so that said arm may freely slide on said rod for freely adjusting the paper-guiding linger along the platen when the paper-guiding finger is lifted away from the platen to enable said springpressed roll to enter Said reliefgr0ove.

EDWIN A. PETERSON.

\Vitnesses Anus ANnEnsoN, JAMES J. lVIcDoXALn. 

